The boy likes playing jokes on his classmates of course makes him popular.A. whichB. who

问题补充：

The boy likes playing jokes on his classmates, of course makes him popular.

A. which

B. whom

C. for which

D. for whom

答案：

(答案→)A. which

B. whom

C. for which

D. for whom

解析：考查非限制性定语从句。of course 在句中作插入语，which 在从句中作主语，指前半句话的含义。